Radio node, wireless device, and methods therein for configuring the wireless device

ABSTRACT

Method in a radio node ( 101 ) for configuring a wireless device ( 120 ). The radio node ( 101 ) and the wireless device ( 120 ) operate in a wireless communications network ( 100 ). The radio node ( 101 ) configures the wireless device ( 120 ) with a plurality of Physical Uplink Control Channel, PUCCH, resource units. The plurality of PUCCH resource units is associated with a number of downlink, DL, aggregated carriers.

TECHNICAL FIELD

The present disclosure relates generally to a radio node, and methodstherein for configuring a wireless device. The present disclosure alsorelates to the wireless device, and methods therein for receiving aconfiguration from the radio node. The present disclosure relates aswell to computer programs and computer-readable storage mediums, havingstored thereon the computer programs to carry out the aforementionedmethods.

BACKGROUND

Communication devices such as wireless devices are also known as e.g.User Equipments (UE), mobile terminals, wireless terminals and/or mobilestations. Wireless devices are enabled to communicate wirelessly in acommunications network or wireless communication system, sometimes alsoreferred to as a radio system or networks. The communication may beperformed e.g. between two wireless devices, between a wireless deviceand a regular telephone and/or between a wireless device and a servervia a Radio Access Network (RAN) and possibly one or more core networks,comprised within the communications network.

Wireless devices may further be referred to as mobile telephones,cellular telephones, laptops, or surf plates with wireless capability,just to mention some further examples. The terminals in the presentcontext may be, for example, portable, pocket-storable, hand-held,computer-comprised, or vehicle-mounted mobile devices, enabled tocommunicate voice and/or data, via the RAN, with another entity, such asanother terminal or a server.

The communications network may cover a geographical area which may bedivided into cell areas, wherein each cell area may be served by anaccess node such as a base station, e.g. a Radio Base Station (RBS),which sometimes may be referred to as e.g. “eNB”, “eNodeB”, “NodeB”, “Bnode”, or BTS (Base Transceiver Station), depending on the technologyand terminology used. The base stations may be of different classes suchas e.g. macro eNodeB, home eNodeB or pico base station, based ontransmission power and thereby also cell size. A cell is thegeographical area where radio coverage is provided by the base stationat a base station site. One base station, situated on the base stationsite, may serve one or several cells. Further, each base station maysupport one or several communication technologies. The base stationscommunicate over the air interface operating on radio frequencies withthe terminals within range of the base stations. In the context of thisdisclosure, the expression Downlink (DL) is used for the transmissionpath from the base station to the mobile station. The expression Uplink(UL) is used for the transmission path in the opposite direction i.e.from the mobile station to the base station.

In 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE),base stations, which may be referred to as eNodeBs or even eNBs, may bedirectly connected to one or more core networks.

3GPP LTE radio access standard has been written in order to support highbitrates and low latency both for uplink and downlink traffic. All datatransmission is in LTE controlled by the radio base station.

Communications such as transmissions in radio communication systems maybe often organized in terms of frames, or sometimes subframes, e.g. inLTE, where each frame is a group of communication resources, e.g., radiotime and frequency resources, that may comprise both, a control fieldand a payload data field, or multiple fields of the respective types. Afield may be understood herein to refer to a set of time and frequencyresources, also referred to herein as time-frequency resources. Thetime-frequency resources corresponding to a field may be contiguous inthe time and frequency dimensions. The control field may, e.g., compriseinformation about how the data part of the frame is encoded andmodulated. The control field may also be used for receiving feedbackinformation in the reverse link direction, i.e., from the receiver ofthe data, e.g., for receiving ACKnowledgement/Negative ACKnowledgement(ACK/NACK) or channel state information reports.

Fields may be in most transmission systems further divided into smallerunits, e.g., in Orthogonal Frequency-Division Multiplexing (OFDM)systems, the fields may be further divided into one or more OFDMsymbols. Something similar holds for many other types of systems thanOFDM, e.g., for many systems based on multi-carrier transmission orpre-coded multi-carrier transmission, such as Filter-Bank Multi-Carrier(FBMC), Discrete Fourier Transform (DFT)-spread OFDM, etc. As a generalterm, such smaller units may be referred to herein as symbols. Somefields may consist of only a single symbol.

LTE may use OFDM in the DL and DFT-spread OFDM in the UL. The basic LTEDL physical resource may thus be seen as a time-frequency grid asillustrated in FIG. 1, where each resource element corresponds to oneOFDM subcarrier during one OFDM symbol interval.

In the time domain, LTE DL transmissions may be organized into radioframes of 10 milliseconds (ms), each radio frame consisting of tenequally-sized subframes of length Tsubframe=1 ms. FIG. 2 is a schematicillustration of the LTE time-domain structure.

The resource allocation in LTE may be typically described in terms ofresource blocks, where a resource block corresponds to one slot, 0.5 ms,in the time domain and 12 contiguous subcarriers in the frequencydomain. A pair of two adjacent resource blocks in time direction, 1.0ms, is known as a resource block pair. Resource blocks may be numberedin the frequency domain, starting with 0 from one end of the systembandwidth.

Carrier Aggregation

The use of LTE Carrier Aggregation (CA), introduced in Rel-10 andenhanced in Rel-11, may offer means to increase the peak data rates,system capacity and user experience by aggregating radio resources frommultiple carriers that may reside in the same band or different bandsand, for the case of inter-band Time-Division Duplex (TDD) CA, thecarriers may be configured with different UL/DL configurations. InRel-12, CA between TDD and Frequency-Division Duplex (FDD) serving cellswas introduced to support UE connecting to them simultaneously. Up tothis release, the maximum number of carriers which are supported is 5.

In Rel-13, Licensed-Assisted Access (LAA) has attracted a lot ofinterest in extending the LTE CA feature towards capturing the spectrumopportunities of unlicensed spectrum in the 5 GHz band. WLAN operatingin the 5 GHz band nowadays may already support 80 Mega Hertz (MHz) inthe field, and 160 MHz is to follow in Wave 2 deployment of IEEE802.11ac. There are also other frequency bands, such as 3.5 Giga Hertz(GHz), where aggregation of more than one carrier on the same band maybe possible, in addition to the bands already widely in use for LTE.Enabling the utilization of at least similar bandwidths for LTE incombination with LAA, as IEEE 802.11ac Wave 2, may support calls forextending the carrier aggregation framework to support more than 5carriers. The extension of the CA framework beyond 5 carriers wasapproved to be one work item for LTE Rel-13. The objective is to supportup to 32 carriers in both UL and DL.

A UE may typically report feedback to the serving network node on thequality of the carrier that carries information that may be exchangedbetween the serving network node and the UE. This may be done so thenetwork node may for example adjust some transmission parameters, toimprove the quality or efficiency of the communication between thenetwork node and the UE. Compared to single-carrier operation, a UEoperating with CA may have to report feedback for more than one DLcomponent carrier. However, a UE may not need to support DL and UL CAsimultaneously. For instance, the first release of CA capable UEs in themarket may only support DL CA, but not UL CA. This is also theunderlying assumption in the 3GPP RAN4 standardization. Hence, supportof DL CA may lead to feedback for multiple DL carriers being carried inone single UL carrier. The capacity of UL control channel for singlecarrier operation cannot meet the new capacity requirements. Therefore,to address this problem, an enhanced UL control channel, i.e. PhysicalUplink Control CHannel (PUCCH) format 3, was introduced in the firstrelease of CA. Such an UL control channel may carry the feedbackinformation from the UE, and is further described in the next section.However, in order to support more component carriers in Rel-13, the ULcontrol channel capacity becomes a limitation. More specifically, Rel-10PUCCH format 3 supports up to 10-bit Hybrid Automatic Repeat reQuest ACK(HARQ-ACK) for FDD and 20-bit for TDD, but a UE configured with 32 DLComponent Carriers (CCs) may need up to 64 bits HARQ-ACK for FDD, andeven more for TDD. Generally, one HARQ-ACK bit may be needed for one DLtransport block. In LTE, at most two transport blocks may be supportedfor allocation to a single UE during a subframe in one serving cell,which corresponds to 2 HARQ-ACK bits.

PUCCH Format 3

To support the transmission of DL and UL transport channels, there maybe a need for UL L1/L2 control signaling. UL L1/L2 control signaling maycarry control information and may comprise: HARQ acknowledgements foracknowledging whether the received Physical Downlink Shared CHannel(PDSCH) transport blocks have been correctly received or not, or whetherthey have been missed, channel-state reports related to the DL channelconditions, such as Channel State Information (CSI), used to assist DLscheduling, and scheduling requests, indicating that a terminal needs ULresources for UL-SCH transmissions.

In LTE, three PUCCH formats with different sizes may be defined whichmay support the transmission of the above-described UL L1/L2 controlsignaling for different purposes.

In LTE PUCCH format 1/1a/1b and PUCCH format 2/2a/2b may be supportedfor Scheduling Request (SR), HARQ-ACK and periodic Channel StateInformation (CSI) reporting. A PUCCH resource may be understood as aphysical resource unit which may be used to convey L1/L2 controlsignaling. Physically, a PUCCH resource may correspond to one or severalphysical resource blocks together with some other transmit parameterssuch as cyclic shift, orthogonal cover code, spreading code, etc . . . .The PUCCH resource may be represented by a single scalar index, that is,a number, from which parameters, e.g., transmission parameters, such asthe phase rotation and/or the orthogonal cover sequence, may be derived,based on PUCCH format. The use of a phase rotation of a cell-specificsequence together with orthogonal sequences may provide orthogonalitybetween different terminals in the same cell transmitting PUCCH on thesame set of resource blocks. In LTE Rel-10, PUCCH format 3 wasintroduced for carrier aggregation and TDD, when there are multiple DLtransmissions, either on multiple carriers or multiple DL subframes, butsingle UL, either single carrier or single UL subframe, for HARQ-ACK, SRand CSI feedback.

Similarly to PUCCH format 1/1a/1b and PUCCH format 2/2a/2b, the PUCCHformat 3 resource may be also represented by a single scalar index,e.g., an integer ranging from 0 to 549, from which the orthogonal coversequence and the resource-block number may be derived. Physically, aPUCCH format 3 resource may correspond to one physical resource blocktogether with some other transmit parameters such as cyclic shift,orthogonal cover code, spreading code, etc . . . . A length-5 orthogonalsequence may be applied for PUCCH format 3 to support code multiplexingwithin one resource-block pair, according to 3GPP TS 36.211, and alength-4 orthogonal cover may be applied for a shorted PUCCH, whereinone OFDM symbol is punctured for SRS transmission in the second slot. Ifthe PUCCH format 3 resource is denoted as n_(PUCCH) ⁽³⁾, the resourceblock number, that is an identifier for each resource block, of thePUCCH format 3 resource m may be determined by the following:m=└n _(PUCCH) ⁽³⁾ /N _(SF,0) ^(PUCCH)┘

The orthogonal cover sequence applied for the two slots corresponding tothe resource-block pair may be derived by the following:

n_(oc, 0) = n_(PUCCH)⁽³⁾mod N_(SF, 1)^(PUCCH)$n_{{oc},1} = \left\{ \begin{matrix}{\left( {3\; n_{{oc},0}} \right){mod}\; N_{{SF},1}^{PUCCH}} & {{{if}\mspace{14mu} N_{{SF},1}^{PUCCH}} = 5} \\{n_{{oc},0}{mod}\; N_{{SF},1}^{PUCCH}} & {otherwise}\end{matrix} \right.$

Where N_(SF,0) ^(PUCCH) and N_(SF,1) ^(PUCCH) are the length of theorthogonal cover sequence for the two slots respectively.

The PUCCH format 3 resource may be determined according to higher layerconfiguration and a dynamic indication from the downlink assignment. Indetail, the Transmitter Power Control (TPC) field in the DownlinkControl Information (DCI) format of the corresponding Physical DownlinkControl CHannel (PDCCH)/Enhanced PDCCH (EPDCCH) may be used by a networknode such as an eNB to determine the PUCCH resource values from one offour resource values configured by higher layers, with the mappingdefined in Table 1, according to 3GPP TS 36.213. According to Table 1,four candidate resources may be configured at a network node by thehigher layers. For each PUCCH transmission, one resource may be selectedfrom the four candidate resources and indicated to a wireless devicesvia the TPC field. Each of these resource values is the scalar index.For FDD, the TPC field may correspond to the PDCCH/EPDCCH for thescheduled secondary serving cells. For TDD, the TPC field may correspondto the PDCCH/EPDCCH for the primary cell with Downlink Assignment Index(DAI) value in the PDCCH/EPDCCH larger than ‘1’. For a given UE, severalPDCCH assignments may be sent to the UE in order to schedule PDSCHtransmissions on more than one serving cell, with e.g. one-to-onemapping between PDCCH assignment and PDSCH transmission. Based on PUCCHformat 3 capacity and the maximum configurable DL carriers number, onlyone PUCCH format 3 may be needed to be configured in Rel-12. Accordingto current specification requirements, a UE may assume that the samePUCCH resource values are transmitted in each DCI format of thecorresponding PDCCH/EPDCCH assignments that may be used to determine thePUCCH for this UE in the subframe. With the duplicate transmission ofthe same PUCCH resource values, the UE avoid the PUCCH resourceambiguity in case some of DCI are missing.

TABLE 1 PUCCH Resource Value for HARQ-ACK Resource for PUCCH Value of‘TPC command for PUCCH’ or ‘HARQ-ACK resource offset’ n_(PUCCH)^((3, {tilde over (p)})) ‘00’ The 1st PUCCH resource value configured bythe higher layers ‘01’ The 2^(nd) PUCCH resource value configured by thehigher layers ‘10’ The 3^(rd) PUCCH resource value configured by thehigher layers ‘11’ The 4^(th) PUCCH resource value configured by thehigher layers

According to the foregoing, existing PUCCH formats do not support thecurrent demands for CA since their capacity is not sufficient to enableUEs to send the necessary amount of bits of information in the UL, e.g.,for HARQ signaling which may be associated with the increase in thenumber of DL carriers. As indicated above in regards to carrieraggregation, the 3GPP Release 13 aims to support up to 32 CCs in both ULand DL. For this purpose, the capacity of the PUCCH, which is thechannel that may carry the UL feedback information from the UE, maybecome a limitation. This may be a problem, especially for UEs notsupporting DL and UL CA simultaneously, where the UE may have totransmit UL control signaling information corresponding to a largenumber of DL component carriers on a single UL carrier. For UEs onlysupporting DL CA, the UL control information may only be transmitted onthe primary UL carrier, as it may be done in Rel-10. As an example, if32 DL CCs are configured for a given UE and two transport blocks arescheduled on each CC, then the UE may need to feedback 64 bits HARQ-ACKin one subframe, which exceeds the maximum capacity of PUCCH format 3,20 bits for TDD and 10 bits for FDD. If e.g., PUCCH format 3, is stillused, when the number of DL component carriers exceed a certain numberof carriers, e.g., 10, or 32 DL carriers, a UE has to drop or abandonsome UL control information due to the capacity limitation. With theloss of this information, the network node may need to retransmit PDSCHor has no way to adjust the transmission parameters to adapt to thechannel condition, thus leading to deterioration of the DL spectrumefficiency.

SUMMARY

It is therefore an object of embodiments herein to improve theperformance of a communications network by providing improved methods ofperforming UL transmission to support carrier aggregation.

According to a first aspect of embodiments herein, the object isachieved by a method in a radio node for configuring a wireless device.The radio node and the wireless device operate in a wirelesscommunications network. The radio node configures the wireless devicewith a plurality of PUCCH resource units. The plurality of PUCCHresource units is associated with a number of DL aggregated carriers.

According to a second aspect of embodiments herein, the object isachieved by a method in the wireless device for receiving theconfiguration from the radio node. The radio node and the wirelessdevice operate in the wireless communications network. The wirelessdevice receives the configuration from the radio node with the pluralityof PUCCH resource units. The plurality of PUCCH resource units isassociated with the number of DL aggregated carriers.

According to a third aspect of embodiments herein, the object isachieved by a radio node configured to configure the wireless device.The radio node and the wireless device are configured to operate in thewireless communications network. The radio node is further configured toconfigure the wireless device with the plurality of PUCCH resourceunits. The plurality of PUCCH resource units is associated with thenumber of DL aggregated carriers.

According to a fourth aspect of embodiments herein, the object isachieved by a wireless device configured to receive the configurationfrom the radio node. The radio node and the wireless device areconfigured to operate in the wireless communications network. Thewireless device is further configured to receive the configuration fromthe radio node with the plurality of PUCCH resource units. The pluralityof PUCCH resource units is associated with the number of DL aggregatedcarriers.

According to a fifth aspect of embodiments herein, the object isachieved by a computer program, comprising instructions which, whenexecuted on at least one processor, cause the at least one processor tocarry out the method performed by the radio node.

According to a sixth aspect of embodiments herein, the object isachieved by a computer-readable storage medium, having stored thereonthe computer program, comprising instructions which, when executed on atleast one processor, cause the at least one processor to carry out themethod performed by the radio node.

According to a seventh aspect of embodiments herein, the object isachieved by a computer program, comprising instructions which, whenexecuted on at least one processor, cause the at least one processor tocarry out the method performed by the wireless device.

According to an eighth aspect of embodiments herein, the object isachieved by a computer-readable storage medium, having stored thereonthe computer program, comprising instructions which, when executed on atleast one processor, cause the at least one processor to carry out themethod performed by the wireless device.

By the radio node configuring the wireless device with a plurality ofPUCCH resource units associated with the number of DL aggregatedcarriers, the capacity of the PUCCH is increased, in a simple way.Hence, UL transmission of control information using carrier aggregationof a large number of carriers, e.g., 32 CC or higher, may be supported.Furthermore, the embodiments herein may be based on the existing PUCCHchannel design, and has the advantages of: simple extension to supportlarger number of DL CCs, low implementation complexity, since existingchannel coding structure may be reused, and backward compatibility withexisting UEs.

BRIEF DESCRIPTION OF THE DRAWINGS

Examples of embodiments herein are described in more detail withreference to attached drawings in which:

FIG. 1 is a schematic diagram illustrating the LTE DL physical resource.

FIG. 2 is a schematic diagram illustrating the LTE time-domainstructure.

FIG. 3 is a schematic diagram illustrating an example of a wirelesscommunications network, according to some embodiments.

FIG. 4 is a schematic diagram illustrating embodiments of a method in aradio node, according to some embodiments.

FIG. 5 is a schematic diagram illustrating embodiments of a method in aradio node, according to some embodiments.

FIG. 6 is a schematic diagram illustrating embodiments of a method in aradio node, according to some embodiments.

FIG. 7 is a schematic diagram illustrating embodiments of a method in aradio node, according to some embodiments.

FIG. 8 is a schematic diagram illustrating actions of a method in awireless device, according to some embodiments.

FIG. 9 is a block diagram of a radio node that is configured accordingto some embodiments.

FIG. 10 is a block diagram of a wireless device that is configuredaccording to some embodiments.

DETAILED DESCRIPTION

Terminologies

The following commonly terminologies are used in the embodiments and areelaborated below:

Radio network node: In some embodiments the non-limiting term radionetwork node is more commonly used and it refers to any type of networknode serving UE and/or connected to other network node or networkelement or any radio node from where UE receives signal. Examples ofradio network nodes are Node B, base station (BS), multi-standard radio(MSR) radio node such as MSR BS, eNode B, network controller, radionetwork controller (RNC), base station controller, relay, donor nodecontrolling relay, base transceiver station (BTS), access point (AP),transmission points, transmission nodes, Remote Radio Unit (RRU), RemoteRadio Head (RRH), nodes in distributed antenna system (DAS) etc.

Network node: In some embodiments a more general term “network node” isused and it may correspond to any type of radio network node or anynetwork node, which communicates with at least a radio network node.Examples of network node are any radio network node stated above, corenetwork node, (e.g. Mobile Switching Centre (MSC), Mobility ManagementEntity (MME) etc), Operation and Maintenance (O&M), Operations SupportSystem (OSS), Self-Optimizing/Organizing Network (SON), positioning node(e.g. Evolved Serving Mobile Location Centre (E-SMLC), Minimization ofDrive Test (MDT), etc.

User equipment: In some embodiments the non-limiting term user equipment(UE) is used and it refers to any type of wireless device communicatingwith a radio network node in a cellular or mobile communication system.Any reference herein to a UE is therefore understood to refer to awireless device. Examples of UE are target device, device to device UE,machine type UE or UE capable of machine to machine communication,Personal Digital Assistant (PDA), Tablet, mobile terminals, smart phone,laptop embedded equipped (LEE), laptop mounted equipment (LME),Universal Serial Bus (USB) dongles etc.

The embodiments herein also applies to the multi-point carrieraggregation systems.

Note that although terminology from 3GPP LTE has been used in thisdisclosure to exemplify the embodiments herein, this should not be seenas limiting the scope of the embodiments herein to only theaforementioned system. Other wireless systems, including Wideband CodeDivision Multiple Access (WCDMA), Worldwide Interoperability forMicrowave Access (WiMax), Ultra Mobile Broadband (UMB) and Global Systemfor Mobile communications (GSM), may also benefit from exploiting theideas covered within this disclosure.

Also note that terminology such as eNodeB and UE should be consideringnon-limiting and does in particular not imply a certain hierarchicalrelation between the two; in general “eNodeB” could be considered asdevice 1 and “UE” device 2, and these two devices communicate with eachother over some radio channel.

In this section, the embodiments herein will be illustrated in moredetail by a number of exemplary embodiments. It should be noted thatthese embodiments are not mutually exclusive. Components from oneembodiment may be tacitly assumed to be present in another embodimentand it will be obvious to a person skilled in the art how thosecomponents may be used in the other exemplary embodiments.

Embodiments herein provide several approaches that may enhance the ULcontrol channel capacity on a single uplink component carrier.

Embodiments herein may provide an enhanced UL channel design fortransmission of UL control signaling. Different signaling methods areprovided from which the physical resources for the enhanced UL channelmay be derived. The enhanced UL channel may be used to transmit L1control signaling including HARQ-ACK, SR and periodic CSI.

Particular embodiments herein may relate to a PUCCH enhancement for LTE.In particular, embodiments herein may relate to an enhanced PUCCH designfor LTE carrier aggregation.

The term PUCCH resource may be used herein. A PUCCH resource may beunderstood as a physical resource unit which may be used to convey L1/L2(Layer 1/layer 2) control signaling. Physically, it may correspond toone or several physical resource blocks together with some othertransmit parameters such as cyclic shift, orthogonal cover code,spreading code, etc . . . , as described in the background section.Thus, any reference herein to a “PUCCH resource” may be understood torefer to a “PUCCH resource unit”.

Any reference herein to the PUCCH, PDCCH and E(PDCCH) is understood tobe applicable to a channel with similar functional characteristics,although a different name may be used.

Embodiments will now be described more fully hereinafter with referenceto the accompanying drawings, in which examples of the claimed subjectmatter are shown. The claimed subject matter may, however, be embodiedin many different forms and should not be construed as limited to theembodiments set forth herein. Rather, these embodiments are provided sothat this disclosure will be thorough and complete, and will fullyconvey the scope of the claimed subject matter to those skilled in theart. It should also be noted that these embodiments are not mutuallyexclusive. Components from one embodiment may be tacitly assumed to bepresent/used in another embodiment.

FIG. 3 depicts an example of a wireless communications network 100,sometimes also referred to as a cellular radio system, cellular networkor wireless communications system, in which embodiments herein may beimplemented. The wireless communications network 100 may for example bea network such as a Long-Term Evolution (LTE), e.g. LTE FrequencyDivision Duplex (FDD), LTE Time Division Duplex (TDD), LTE Half-DuplexFrequency Division Duplex (HD-FDD), LTE operating in an unlicensed band,WCDMA, Universal Terrestrial Radio Access (UTRA) TDD, GSM network,GSM/Enhanced Data Rate for GSM Evolution (EDGE) Radio Access Network(GERAN) network, Ultra-Mobile Broadband (UMB), EDGE network, networkcomprising of any combination of Radio Access Technologies (RATs) suchas e.g. Multi-Standard Radio (MSR) base stations, multi-RAT basestations etc., any 3rd Generation Partnership Project (3GPP) cellularnetwork, WiFi networks, WiMax, 5G system or any cellular network orsystem. Thus, although terminology from 3GPP LTE may be used in thisdisclosure to exemplify embodiments herein, this should not be seen aslimiting the scope of the embodiments herein to only the aforementionedsystem.

The wireless communications network 100 comprises a radio node 101. Theradio node 101 may be a radio network node, such as a network node 110described below. In the non-limiting particular example illustrated inFIG. 3, the radio node 101 is the network node 110.

The network node 110 may be a transmission point such as a radio basestation, for example an eNB, an eNodeB, or an Home Node B, an Home eNodeB or any other network node capable to serve a wireless device, such asa user equipment or a machine type communication device in a wirelesscommunications network.

The wireless communications network 100 covers a geographical area whichis divided into cell areas, wherein each cell area is served by anetwork node, although, one network node may serve one or several cells.In the non-limiting example depicted in FIG. 3, the network node 110serves a first cell 131 or primary cell 131. The primary cell 131 istypically in licensed spectrum. The network node 110 also serves asecond cell 132, secondary cell 132, e.g., a licensed-assisted accesscell 132 in unlicensed spectrum. The primary cell 131 and the secondarycell 132 are used for communication between the network node 110 andwireless device 120. The network node 110 may also serve one or moreadditional secondary cells, as will be described later. This is howevernot represented in FIG. 3, to simplify the Figure. The network node 110may be of different classes, such as, e.g., macro eNodeB, home eNodeB orpico base station, based on transmission power and thereby also cellsize. Typically, the wireless communications network 100 may comprisemore cells similar to the first cell 131 and the second cell 132, servedby their respective network node. This is not depicted in FIG. 3 for thesake of simplicity. The network node 110 may support one or severalcommunication technologies, and its name may depend on the technologyand terminology used. In 3GPP LTE, the network node 110, which may bereferred to as eNodeBs or even eNBs, may be directly connected to one ormore core networks.

The wireless device 120 also referred to herein as a user equipment orUE is located in the wireless communication network 100. The wirelessdevice 120 may e.g. be a user equipment, a mobile terminal or a wirelessterminal, a mobile phone, a computer such as e.g. a laptop, a PersonalDigital Assistants (PDAs) or a tablet computer, sometimes referred to asa surf plate, with wireless capability, or any other radio network unitscapable to communicate over a radio link in a wireless communicationsnetwork. Please note the term user equipment used in this document alsocovers other wireless devices such as Machine to machine (M2M) devices.

The radio node 101 is configured to communicate within the wirelesscommunications network 100 with the first wireless device 120 over afirst radio link 141 in the primary cell 131, and over a second radiolink 142 in the secondary cell 132. While not illustrated in the FIG. 3,the second radio link 142 or one of equivalent characteristics may alsobe established between the radio node 101 and another radio node.

In the following discussion, any reference to a UE is used as an exampleof the wireless device 120 and an eNB is used as an example of the radionode 101.

Embodiments of a method performed by the radio node 101, e.g., thenetwork node 110, for configuring the wireless device 120, will now bedescribed with reference to the flowchart depicted in FIG. 4. As statedearlier, the radio node 101 and the wireless device 120 operate in thewireless communications network 100.

The method may comprise the following actions, which actions may as wellbe carried out in another suitable order than that described below. Insome embodiments, the radio node 101 may perform all actions, whereas inother embodiments, some actions may be performed. In some embodiments,the order of the actions illustrated in FIG. 4 may be changed in one ormore actions. The optional actions are indicated with dashed blocks. Oneor more embodiments may be combined, where applicable. All possiblecombinations are not described to simplify the description.

Action 401

In order to increase the capacity of the PUCCH, and therefore enable ULtransmission of control information using carrier aggregation of a largenumber of carriers in the DL, e.g., 32 CC, in this action, the radionode 101 configures the wireless device 120 with a plurality of PUCCHresource units, wherein the plurality of PUCCH resource units isassociated with a number of DL aggregated carriers. In other words, fora number of DL aggregated carriers, the number being larger than one,the radio node 101 configures the wireless device 120 with multiplePUCCH resource units, that is, the radio node 101 allocates multiplePUCCH resource units to the wireless device 120. The DL aggregatedcarriers may be understood as the aggregated carriers used fortransmission from the radio node 101 to the wireless device 120. Thenumber may be understood as being lager than one. In some examples, thenumber of DL aggregated carriers may be 32. The aggregated carriers maybe understood to be aggregated because they may be used to increase thebandwidth for the radio node 101 to serve the wireless device 120.

Associated with may be understood herein as meaning or assigned to inorder to carry feedback information on information received on the sameDL aggregated carriers.

The configuring may be implemented, for example, by the sending a RadioResource Control (RRC) message and/or Medium Access Control (MAC)message and/or physical layer signal to the wireless device 120. Thismay be performed after the radio node 101 obtains information from anindication of a capability of the wireless device 120, or releaseinformation regarding the wireless device 120. For example, when thewireless device 120 may claim it is a Rel-13 UE, it may be mandatory tosupport more DL carriers.

In general, they may be two different ways of configuring multiple PUCCHresources for the wireless device 120, that is different ways ofconfiguring the plurality of PUCCH resource units. In a first possibleimplementation, Alternative 1, the radio node 101 may configure multiplePUCCH resources groups, where each resource group may represent aplurality of PUCCH resource units. In additional actions, the radio node101 may then select one resource group out of multiple groups and signalthis selection to the wireless device 120, as explained in the actionsbelow. In a second possible implementation, Alternative 2, the radionode 101 may configure multiple PUCCH resource units, which are notgrouped. The radio node 101 may, for example, configure differentresource units for different carriers so that multiple PUCCH resourceunits may be configured, as discussed below.

Alternative 1

According to Alternative 1, in some embodiments, each aggregated carrierin the number of DL aggregated carriers may be allocated the pluralityof PUCCH resource units as a group.

The wireless device 120 may be configured with multiple groups of PUCCHresources configured e.g., by RRC, as shown in Table 2. Each group ofPUCCH resources may comprise a plurality of PUCCH resources which mayalso be semi-statically configured e.g., by RRC.

In some embodiments, the plurality of PUCCH resource units may beidentifiable by an indicator in a single DL scheduling assignment whichis transmitted to the wireless device. That is, the plurality of PUCCHresource units may be identifiable by a single indicator in a respectivesingle DL scheduling assignment. The single DL scheduling assignment maycorrespond to a Physical Downlink Control Channel (PDCCH) or an EnhancedPhysical Downlink Control Channel (EPDCCH) for the wireless device 120.

The indicator may be understood as a number or value representing theplurality of PUCCH resource units. As an example of the indicator, thegroup of PUCCH resources may be represented by a single scalar index.The scalar index may be mapped to one or a plurality of PUCCH resourcesaccording to some predefined rules. As one example of such rules, {0, .. . , X} may correspond to a set of single PUCCH resources, {X+1, . . ., Y)} may correspond to a set of resource combinations with each indexdenoting two PUCCH resources, {Y+1, . . . , Z} may correspond to a setof resource combinations with each index denoting three PUCCH resources,etc . . . . In these examples, a resource index between 0 and X maycorrespond to one PUCCH resource, and X may correspond to the totalnumber of PUCCH resources in the system, e.g., in the subframe. Aresource index between X+1 and Y may correspond to a PUCCH combinationwith two PUCCH resources and Y-X may correspond to the total number oftwo PUCCH resource combinations. A resource index between Y+1 and Z maycorrespond to a PUCCH combination with three PUCCH resources and Z-Y maycorrespond to the total number of three PUCCH resource combinations.

The PUCCH resources mentioned above may be from one of the existingPUCCH formats, e.g. PUCCH format 3, so that the 3GPP Release 10 channelstructure may be reused. At the physical layer, one of the PUCCHresource groups may be dynamically indicated by a predefined DCI field,for example, in the (E)PDCCH DL assignment in the secondary cells. As anexample, the DCI field may be the TPC field, as shown in Table 2.Moreover, the wireless device 120 may assume that the same PUCCHresource values are transmitted in each DCI format of the corresponding(E)PDCCH assignments.

In some embodiments, the configuring 401 may comprise configuring 401the wireless device 120 with a set of pluralities of PUCCH resourceunits, that is, with multiple groups of PUCCH resources, as mentionedabove. In such embodiments, each of the pluralities of PUCCH resourceunits may be identifiable by a respective indicator in a respectivesingle DL scheduling assignment.

In some embodiments, each of the pluralities of PUCCH resource units maybe represented by a single index, e.g., a scalar index such as thatdescribed earlier, each single index corresponding to the respectiveindicator.

In some particular embodiments, each of the pluralities of PUCCHresource units may be grouped, although in other embodiments, only someof the pluralities may be grouped.

In some embodiments, at least one of the pluralities of PUCCH resourceunits is associated with the number of DL aggregated carriers. In someparticular embodiments, each of the pluralities of PUCCH resource unitsare associated with the number of DL aggregated carriers. In someembodiments wherein carrier aggregation is used, the single DLscheduling assignment may comprise a field for each of the aggregatedcarriers, e.g., a predefined DCI field, for example, in the (E)PDCCH DLassignment in the secondary cells. By packing multiple PUCCH resourcestogether, the DCI field may indicate several PUCCH resources.

TABLE 2 PUCCH Resource Value for HARQ-ACK Resource for PUCCH Value of‘TPC command for PUCCH’ or ‘HARQ-ACK resource offset’ n_(PUCCH)^((3, {tilde over (p)})) ‘00’ The 1st group of PUCCH resource valuesconfigured by the higher layers ‘01’ The 2^(nd) group of PUCCH resourcevalues configured by the higher layers ‘10’ The 3^(rd) group of PUCCHresource values configured by the higher layers ‘11’ The 4^(th) group ofPUCCH resource values configured by the higher layers

In some embodiments, the PUCCH resource units may be of PUCCH format 3.If PUCCH format 3 is concerned, the PUCCH resources may correspond toeither the same physical block with different orthogonal sequences ordifferent PUCCH resources in separate resource blocks. The PUCCHresources corresponding to each TPC index may be on the same componentcarrier or they may also be on different component carriers. In order torealize this, the radio node 101 may need to include the serving cellindex when the PUCCH resources are configured.

Peak to Average Power Ratio (PAPR) is one of the design challenges forUL in OFDM systems. PAPR may be understood as the ratio between theaverage transmit power of a signal and the maximum instantaneoustransmit power and it may have implications on a power amplifier. Inorder to reduce PAPR, it may be preferable to have consecutive PUCCHresource allocations. Otherwise, the lower PAPR property of the SingleCarrier Frequency-Division Multiple Access (SC-FDMA) may be break.SC-FDMA may be interpreted as a linearly preceded orthogonalFrequency-Division Multiple Access (OFDMA) scheme, in the sense that itmay have an additional Discrete Fourier Transform (DFT) processing steppreceding the conventional OFDMA processing. The DFT outputs may bemapped to a subset of consecutive subcarriers, thereby confining them toonly a fraction of the system bandwidth. Owing to its inherent singlecarrier structure, a prominent advantage of SC-FDMA over OFDM and OFDMAmay be that its transmit signal has a lower peak-to-average power ratio(PAPR). If the Physical Resource Block (PRB) allocation isnon-contiguous in frequency, the lower PAPR property may not bemaintained. In order to reduce the PAPR at the UE, each group of PUCCHresources may correspond to consecutive physical resource blocks. Thismay be done by restricting the difference of the two consecutive PUCCHresource values within the twice of length of the orthogonal sequence.Hence, in some embodiments, at least one of the pluralities of PUCCHresource units may be mapped to consecutive resource units.

In terms of how to organize the HARQ-ACK bits to be reported by thewireless device 120 within the configured plurality of PUCCH resourceunits, the ordering for the HARQ-ACK bits may follow the increasingorder of the scheduled serving cells index. This approach may have thebenefit of resource saving, in case many serving cells are configuredbut only a few of them have PDSCH transmissions or Semi-PersistentScheduling (SPS) release. In case one PUCCH resource may not carry allthe HARQ-ACK bits for the scheduled serving cells, one alternative maybe to fill up PUCCH resources in an increasing order, first to use upthe 1st PUCCH resource, also referred to as 1^(st) PUCCH resource unit,then the 2nd PUCCH resource, also referred to as the 2^(nd) PUCCHresource unit, and so on. Another alternative may be to split theHARQ-ACK bits equally on all the available resources. In case one of theaggregated serving cell is TDD, the HARQ-ACK bits corresponding to thesame TDD component carrier may be carried only on one PUCCH formatresource.

One example according to Alternative 1 is shown in FIG. 5, which will bedescribed later.

Alternative 2

According to Alternative 2, in any of the above, or in otherembodiments, for at least some of the aggregated carriers in the numberof downlink aggregated carriers, each aggregated carrier may beallocated a different PUCCH resource unit within the plurality of PUCCHresource units, wherein each PUCCH resource unit may be identifiable bya respective indicator in a respective single DL scheduling assignment.A respective DL scheduling assignment may be understood herein as the DLscheduling assignment wherein a particular PUCCH resource unit may bespecified or indicated.

In an example, the wireless device 120 may be configured with multiplePUCCH resources configured e.g., by RRC, similar to the existing schemeas shown in Table 1. Each PUCCH resource may be a LTE 3GPP Release 10PUCCH format 3, so that the existing channel structure may be reused. Atthe physical layer, one predefined field of (E)PDCCH DL assignment ineach of the secondary cells may dynamically indicate one PUCCH resource,e.g., through the respective indicator. Respective indicator may beunderstood herein as meaning that each PUCCH resource unit within theplurality of PUCCH resource units has its corresponding, different,indicator in its corresponding DL scheduling assignment. The said fieldsin the DCI format of the (E)PDCCH DL assignment in different secondarycells may be different, so that multiple PUCCH resources may beallocated to one wireless device, that is, the wireless device 120.However, the field for some of the serving cells may be the same,implying that same PUCCH resources are allocated for these resources,that is, these serving cells with the same said fields.

As stated earlier, the indicator may be comprised in a field, of thesingle DL scheduling assignment, e.g., a predefined DCI field, forexample, in the (E)PDCCH DL assignment in the secondary cells.

There may be multiple approaches to implement the DCI field to indicatethe PUCCH resources, which may be applied to both for Alternative 1 andAlternative 2.

In the first approach, a TPC field may be used. Each TPC index mayindicate one PUCCH resource selected from the configured PUCCHresources, e.g., configured in Action 401. In this approach, each DLcomponent carrier may have its own PUCCH resource configuration. Forexample, each DL component carrier may be allocated a different PUCCHresource unit within the plurality of PUCCH resource units. The PUCCHresources of different component carriers may be overlapped.

In the second approach, the field may consist of two sections, onesection, e.g., a first section, is to indicate the UL component carrierwhich carries the PUCCH resource, and one section, e.g., a secondsection, is to indicate the PUCCH resource offset with respect to thefirst PUCCH resource within the component carrier. With this approach,the advantage is to enable the radio node 101 to dynamically allocatethe PUCCH resource based on the DL scheduling, via setting a differentvalue to the first section in the DCI. For example, when the wirelessdevice 102 may be configured with two UL component carriers, if the loadof one UL component carrier is light, the scheduler may put all thePUCCH on that UL component carrier via setting the same value in thefirst section. If the load for both the UL component carriers are heavy,the PUCCH may be distributed into two UL component carriers to balancethe load via setting a different value in the first section. However,more DCI bits may be needed to indicate the PUCCH resource.

In the third approach, the PUCCH resource may be decided by the DCIfield, which may indicate the PUCCH resource together with the servingcell index information. In this approach, the feedback of the one DLcomponent carrier may be one-to-one associated with one UL componentcarrier. The association may be predefined or statically configured. TheDCI field may only represent the PUCCH resource within the associated ULcomponent carrier. In order to decide the PUCCH resource, the wirelessdevice 120 may need to determine the UL component carrier which carriesthe PUCCH, based on the configured association, then determine, that is,derive, the PUCCH resource based on the PUCCH resource indicated by thefield and the determined uplink component carrier.

The HARQ-ACK bits for the primary cell 131 may be reported on apredefined PUCCH resource. One option is to map the HARQ-ACK bits forthe primary cell 131 on the resources indicated by the TPC field in DCIformat of the (E)PDCCH DL assignment of secondary cells with the lowestcell index, since the TPC field of primary cell 131 may e.g., be usedfor transmit power control, not for PUCCH resource index. For theHARQ-ACK bits for the secondary cells, they may be transmitted on theresources indicated by the by the DCI field in DCI format of the(E)PDCCH DL assignment of same secondary cell.

One example according to Alternative 2 is shown in FIG. 6, which will bedescribed later. As an example in FIG. 6, the HARQ-ACK bits for SCell 1may be carried on PUCCH resource 1 and the HARQ-ACK bits for SCell 2 maybe carried on PUCCH resource 2.

To summarize this Action 401, by the radio node 101 configuring thewireless device 120 with the plurality of PUCCH resource units, whereinthe plurality of PUCCH resource units is associated with a number of DLaggregated carriers, the wireless device 120 is provided with a largercapacity to provide feedback information to the radio node 101 in theUL, about the DL aggregated carriers.

Action 402

When the radio node 101 has something e.g. data and/or controlinformation to transmit to the wireless device 120, it may send a DLgrant to the wireless device 120, and select one of the PUCCH resourcesconfigured for the wireless device 120. Thus, in this action, the radionode 101 may select a plurality out of the configured set of pluralitiesof PUCCH resource units for allocation to the wireless device 120. Thisaction is optional.

In some embodiments, the selecting 402 may be based on at least one of:a) a number of aggregated carriers used for transmission between theradio node 101 and the wireless device 120, that is, how many aggregatedcarriers are used, DL, UL or both, b) a type of carriers used fortransmission between the radio node 101 and the wireless device 120,e.g., carriers using licensed spectrum or unlicensed spectrum, DL, UL orboth, c) a type of uplink information transmitted by the wireless device120 from: a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK),a scheduling request (SR), and a periodic Channel State Information(CSI), and d) a duplex mode used in each of the carriers used fortransmission out of: a Time Division Duplex mode and a FrequencyDivision Duplex mode.

As one example for a), when the number of aggregated carriers issmaller, the resource index between 0 and X may be selected, when thenumber of aggregated carriers is larger, the resource index between Yand Z may be selected.

As another example for b), when most of the carriers use licensedspectrum, more bits may be expected, and the resource index between Yand Z may be selected. When most of the carriers use unlicensedspectrum, the feedback bits may be bundled together and thus theexpected feedback bits may be reduced. Hence, the resource index between0 and X may be selected.

As another example for c), when there is only HARQ-ACK needed tofeedback, few bits may be expected, and the resource index between 0 andX may be selected. When the feedback includes both CSI and HARQ-ACKbits, more bits may be expected, and the resource index between Y and Zmay be selected.

As another example for d), when TDD is configured for all the carriers,more feedback bits may be expected, and the resource index between Y andZ may be selected. When FDD is configured for all the carriers, fewfeedback bits may be expected, and the resource index between 0 and Xmay be selected.

Action 403

Once the radio node 101 has selected the plurality of PUCCH resourceunits, the radio node 101 may indicate the selected plurality of PUCCHresource units to the wireless device 120 in a DL scheduling assignment.This action is optional.

In some embodiments, the indicating 403 may comprise sending therespective indicator to the wireless device 120 for the selectedplurality of PUCCH resource units, the indicator being comprised in afield of the respective single DL scheduling assignment.

The field may be one of: a) the TCP field; b) a field comprising twosections, wherein one section is to indicate a UL component carrierwhich carries the selected plurality of PUCCH resource units, and onesection is to indicate the PUCCH resource offset with respect to a firstPUCCH resource unit within the UL component carrier; and c) a DCI field,which indicates the selected plurality of PUCCH resource units togetherwith a serving cell index information.

In some embodiments, the respective single DL scheduling assignment issent over a Physical Downlink Control Channel PDCCH or an EnhancedPhysical Downlink Control Channel EPDCCH.

Action 404

The selected plurality of PUCCH resource units indicated to the wirelessdevice 120 may then be used by the wireless device 120 to send ULinformation, e.g., a HARQ-ACK, to the radio node 101. Thus, in thisaction, the radio node 101 may receive UL information from the wirelessdevice 120 on the selected plurality of PUCCH resource units.

One example of the PUCCH resource determination or selection of Action402, according to embodiments herein for the Alternative 1 describedabove is shown in FIG. 5, wherein the wireless device 120 uses carrieraggregation of three DL component carriers for transmission, e.g., fromthe radio node 101; a primary cell (PCell) 131, a first Secondary Cell(SCell 1) such as the secondary cell 132, and a second Secondary Cell(SCell 2), such as the secondary cell 132. In FIG. 5, a PUCCH resourceunit is represented as a rectangle, labeled as “PUCCH resource”, and aresource number. In this example, each group comprises two PUCCHresource units. Each of the four groups represented corresponds to arespective PUCCH resource group configured by the radio node 101, e.g.,by the higher layers. On the left side of the figure, the rectangle atthe top represents a DL scheduling assignment 511 in the PCell 131 forthe wireless device 120, the rectangle in the middle represents a DLscheduling assignment 512 in the SCell 1 for the wireless device 120,and the rectangle at the bottom represents a DL scheduling assignment513 in the SCell 2 for the wireless device 120. In this example, the DLscheduling assignment in the PCell 131 is mapped to the first Group ofPUCCH resources, PUCCH resource 1 and PUCCH resource 2, out of the fourdifferent groups: Group 1, Group 2, Group 3 and Group 4. Also in thisexample, a 00 value, the indicator, in the TPC field of a PDCCH for thewireless device 120, is mapped to the first Group of PUCCH. According toAction 402, the radio node 101 serving the wireless device 120 may haveselected Group 1 for the wireless device 120 out of the four groups ofPUCCH resources based on one of the number of component carriers that isscheduled for the wireless device 120. In summary, FIG. 5 shows anexample of embodiments herein wherein each aggregated carrier, PCell,SCell 1 and SCell 2, in the number of downlink aggregated carriers.PCell+SCell 1+SCell 2, is allocated the plurality of PUCCH resourceunits, PUCCH resource 1 and PUCCH resource 2, as a group, called Group1. The plurality of PUCCH resource units, PUCCH resource 1 and PUCCHresource 2, is identifiable by a single indicator, ‘00’, in a respectivesingle Downlink, DL, scheduling assignment 511, 512, 513.

One example of the PUCCH resource determination according to embodimentsherein for the Alternative 2 described above is given in FIG. 6. In thisexample, the wireless device 120 uses carrier aggregation of threecarriers for transmission e.g., from the radio node 101: the primarycell (PCell) 131, a first Secondary Cell (SCell 1) such as the secondarycell 132, and a second Secondary Cell (SCell 2) such as the secondarycell 132. On the left side of the figure the rectangle at the toprepresents a DL scheduling assignment 611 in the PCell 131 for thewireless device 120, the rectangle in the middle represents a DLscheduling assignment 612 in the SCell 1 for the wireless device 120,and the rectangle at the bottom represents a DL scheduling assignment613 in the SCell 2 for the wireless device 120. In this example, the DLscheduling assignment 611 in the PCell 131 is mapped to the first PUCCHresource unit, PUCCH resource 1. Also in this example, a 00 value, theindicator, in the TPC field of a PDCCH for the wireless device 120 inthe SCell 1 132, is mapped to the first PUCCH resource unit. A 01 valuein the TPC field of a PDCCH for the wireless device 120 in the SCell 2,is mapped to the second PUCCH resource unit, PUCCH resource 2, out ofthe four different PUCCH resource units. The radio node 101 serving thewireless device 120 may have selected PUCCH resource 1 and PUCCHresource 2 for the wireless device 120 out of the four PUCCH resources,in this example, based on, for example, the fact that SCell 1 is usinglicensed spectrum while SCell 2 132 is using unlicensed spectrum. Insummary, FIG. 6 shows an example of embodiments herein wherein for atleast some of the aggregated carriers, SCell 1 and SCell 2, in thenumber of downlink aggregated carriers, PCell+SCell 1+SCell 2, eachaggregated carrier, SCell 1 and SCell 2, is allocated a different PUCCHresource unit, PUCCH resource 1 and PUCCH resource 2, within theplurality of PUCCH resource units, PUCCH resource 1 and PUCCH resource2, wherein each PUCCH resource unit is identifiable by a respectiveindicator, ‘00’ or ‘01’, in a respective single Downlink, DL, schedulingassignment 611, 612, 613.

FIG. 7 illustrates another example of the above example, for thewireless device 120, wherein the wireless device 120 uses CA with 5component carriers: a PCell 131 and SCell 1 to 4, each such as thesecondary cell 132. In this example, a first PUCCH resource unit, PUCCHresource 1, is mapped to the DL scheduling assignment 711 in the PCell131. Also in this example, the first PUCCH resource unit, PUCCH resource1, is mapped to a 00 value, the indicator, in the TPC field of a PDCCHfor the wireless device 120 in the SCell 1, corresponding to its DLscheduling assignment 712, and SCell 2, corresponding to its DLscheduling assignment 713, and a second PUCCH resource unit, PUCCHresource 2, is mapped to a 01 value in the TPC field of a PDCCH for theUE in the SCell 3, corresponding to its DL scheduling assignment 714,and SCell 4, corresponding to its DL scheduling assignment 714. Insummary, FIG. 7 shows an example of embodiments herein wherein for atleast some of the aggregated carriers, SCell 1 and SCell 2 on the onehand and SCell 3 and SCell 4 on the other, in the number of downlinkaggregated carriers, PCell+SCell 1+SCell 2+SCell 3+SCell 4, eachaggregated carrier, SCell 1 or SCell 2 on the one hand and SCell 3 orSCell 4 on the other, is allocated a different PUCCH resource unit,PUCCH resource 1 and PUCCH resource 2, within the plurality of PUCCHresource units, PUCCH resource 1 and PUCCH resource 2, wherein eachPUCCH resource unit is identifiable by a respective indicator, ‘00’ or‘01’, in a respective single Downlink, DL, scheduling assignment 711,712, 713, 714, 715. What this example in FIG. 7 shows is that the ULcapacity of the wireless device 120 may also be increased by assigningmultiple DL carriers to the same UL resource.

As may be understood from the examples provided by FIGS. 5-7, the PUCCHcapacity for the wireless device 120 may be increased by the radio node101 either configuring the plurality of PUCCH resources for one orseveral CCs, or by configuring several CC to a same PUCCH resource. Thismay be compared with existing methods wherein a single PUCCH resource isalways configured for multiple aggregated CC.

Embodiments of a method performed by the wireless device 120 forreceiving the configuration from the radio node 101, will now bedescribed with reference to the flowchart depicted in FIG. 8.

The method may comprise the following actions, which actions may as wellbe carried out in another suitable order than that described below. Insome embodiments, the wireless device 120 may perform all actions,whereas in other embodiments, some actions may be performed. In someembodiments, the order of the actions illustrated in FIG. 8 may bechanged in one or more actions. The optional actions are indicated. Oneor more embodiments may be combined, where applicable. All possiblecombinations are not described to simplify the description.

The detailed description of some of the following corresponds to thesame references provided above, in relation to the actions described forthe radio node 101, and will thus not be repeated here. For example, thesingle DL scheduling assignment may correspond to a PDCCH or a EPDCCHfor the wireless device 120.

Action 801

As described earlier, in order to increase the capacity of the PUCCH,and therefore enable UL transmission of control information usingcarrier aggregation of a large number of carriers in the DL from theradio node 101, e.g., 32 CC, in this action, the wireless device 120receives the configuration from the radio node 101 with the plurality ofPUCCH resource units, wherein the plurality of PUCCH resource units isassociated with the number of DL aggregated carriers.

As mentioned before, this action may be implemented, for example, by thereceiving the RRC message from the radio node 101. The PUCCH resourceunits may be of PUCCH format 3.

The configuration according to Action 801 may be implemented accordingto the two alternatives 1 and 2 that were described in relation toAction 401. Only some aspects will be summarized here. In summary,according to Alternative 1, in some embodiments, each aggregated carrierin the number of DL aggregated carriers may be allocated the pluralityof PUCCH resource units as a group, wherein the plurality of PUCCHresource units may be identifiable by the single indicator in therespective single DL scheduling assignment.

In some embodiments, the plurality may be identifiable by the indicatorin the single DL scheduling assignment.

In some embodiments, the configuration from the radio node 101 maycomprise the set of pluralities of PUCCH resource units.

In some embodiments, each of the pluralities of PUCCH resource units maybe identifiable by the respective indicator in the respective single DLscheduling assignment.

In some embodiments each of the pluralities of PUCCH resource units maybe represented by a single index, each single index corresponding to therespective indicator.

In some embodiments, each of the pluralities of PUCCH resource units maybe grouped.

In some embodiments, at least one each of the pluralities of PUCCHresource units may be associated with the number of DL aggregatedcarriers. In some particular embodiments, all of the pluralities ofPUCCH resource units are associated with the number of DL aggregatedcarriers.

How the wireless device 120 may organize the HARQ-ACK bits to bereported to the radio node 101 within the configured plurality of PUCCHresource units, has already been described in Action 401, and will notbe repeated here.

Accordingly, in some embodiments, at least one of the pluralities ofPUCCH resource units may be mapped to consecutive resource units.

According to Alternative 2, in some of these or other embodiments, forat least some of the aggregated carriers in the number of downlinkaggregated carriers, each aggregated carrier may be allocated adifferent PUCCH resource unit within the plurality of PUCCH resourceunits, wherein each PUCCH resource unit may be identifiable by therespective indicator in the respective single DL scheduling assignment.

Action 802

As explained above in reference to Actions 402 and 403, when the radionode 101 has something e.g. data and/or control information to transmitto the wireless device 120, it may send a DL grant to the wirelessdevice 120, and select one of the PUCCH resources configured for thewireless device 120. Thus, in this action, the wireless device 120 mayreceive the indication from the radio node 101 with the selectedplurality out of the configured set of pluralities of PUCCH resourceunits for allocation to the wireless device 120, in a DL schedulingassignment. This action is optional.

In some embodiments, the receiving 802 may comprise receiving therespective indicator from the radio node 101 for the selected plurality,the indicator being comprised in the field of the respective single DLscheduling assignment.

In some embodiments, the field may be one of: a) the TCP, field; b) thefield comprising two sections, wherein one section is to indicate a ULcomponent carrier which carries the selected plurality of PUCCH resourceunits, and one section is to indicate the PUCCH resource offset withrespect to a first PUCCH resource unit within the UL component carrier;and c) the DCI field, which indicates the selected plurality of PUCCHresource units together with a serving cell index information.

In some embodiments, the selected plurality of PUCCH resource units mayhave been selected by the radio node 101 based on at least one of: thenumber of aggregated carriers used for transmission between the radionode 101 and the wireless device 120 DL, UL or both, the type ofcarriers used for transmission between the radio node 101 and thewireless device 120 DL, UL or both, the type of uplink informationtransmitted by the wireless device 120 from: the HARQ-ACK, the SR andthe periodic CSI, and the duplex mode used in each of the carriers usedfor transmission out of: the TDD mode or the FDD mode.

In some embodiments, the respective single DL scheduling assignment maybe received over the PDCCH or the EPDCCH.

Action 803

The wireless device 120 may then need to determine which carrier maycarry the PUCCH based on the configuration mentioned previously, e.g.,based on the value in the first section of the TPC field. Thus, in thisaction, the wireless device 120 may determine one or more carriers fortransmission of UL information on the selected plurality of the PUCCHresource units to the radio node 101. This action is optional.

Action 804

The wireless device 120 may then need to derive the PUCCH resource basedon the indication received in PDCCH. For that purpose, in this action,the wireless device 120 may determine, e.g., derive, the selectedplurality of the PUCCH resource units, based on the received indicationand the received configuration from the radio node 101. For example, inregards to the Table 2 described earlier, in action 801, all theinformation in Table 2 may received. As described in action 802, onevalue may have been selected from the first column of Table 2 to send tothe wireless device 120, i.e., “00”. Based on Table 2 and the “00”, thewireless device 120 may need to map which physical resource may be used,for example, which PRBs, which cover code, which sequence, etc. may beused

Action 805

In this action, the wireless device 120 may send the UL information,e.g., a HARQ-ACK, to the radio node 101 on the selected plurality ofPUCCH resource units.

In some embodiments, the sending 805 the UL information to the radionode 101 comprises sending the UL information on the derived pluralityof PUCCH resource units, and using the determined one or more carriers.

By the wireless device 120 having received the configuration from theradio node 101 with the plurality of PUCCH resource units, whichplurality of PUCCH resource units is associated with the number of DLaggregated carriers, the wireless device 120 may now in this Action 805send the UL information to the radio node 101 about a large number ofaggregated carriers, e.g., 32 CC.

To perform the method actions described above in relation to FIGS. 4-7,the radio node 101 is configured to configure the wireless device 120.The radio node 101 comprises the following arrangement depicted in FIG.9. As already mentioned, the radio node 101 and the wireless device 120are configured to operate in the wireless communications network 100.

The detailed description of some of the following corresponds to thesame references provided above, in relation to the actions described forthe radio node 101, and will thus not be repeated here.

The radio node 101 is further configured to, e.g., by means of aconfiguring module 901, to configure the wireless device 120 with theplurality of PUCCH resource units, wherein the plurality of PUCCHresource units is associated with the number of DL aggregated carriers.

In some embodiments, for at least some of the aggregated carriers in thenumber of downlink aggregated carriers, each aggregated carrier may beconfigured to be allocated a different PUCCH resource unit within theplurality of PUCCH resource units, wherein each PUCCH resource unit maybe identifiable by the respective indicator in the respective single DLscheduling assignment.

In some of these or other embodiments, each aggregated carrier in thenumber of DL aggregated carriers may be configured to be allocated theplurality of PUCCH resource units as a group, wherein the plurality ofPUCCH resource units may be identifiable by the single indicator in therespective single DL scheduling assignment.

In some embodiments, the plurality may be identifiable by the indicatorin the single DL scheduling assignment.

The configuring module 901 may be a processor 906 or processing moduleof the radio node 101.

In some embodiments, to configure comprises to configure the wirelessdevice 120 with the set of pluralities of PUCCH resource units, each ofthe pluralities being identifiable by the respective indicator in therespective single DL scheduling assignment. This may also be implementedby means of the configuring module 901.

In some embodiments, each of the pluralities of PUCCH resource units isrepresented by the single index, each single index corresponding to therespective indicator.

In some embodiments, each of the pluralities of PUCCH resource units isgrouped.

In some embodiments, at least one of the pluralities of PUCCH resourceunits is associated with the number of DL aggregated carriers.

In some embodiments, at least one of the pluralities of PUCCH resourceunits is mapped to consecutive resource units.

In some embodiments, the PUCCH resource units are of PUCCH format 3.

The radio node 101 may further configured to, e.g., by means of aselecting module 902 configured to, select the plurality out of theconfigured set of pluralities of PUCCH resource units for allocation tothe wireless device 120.

The selecting module 902 may be the processor 906 of the radio node 101.

In some embodiments, to select is configured to be based on at least oneof: the number of aggregated carriers used for transmission between theradio node 101 and the wireless device 120 DL, UL or both, the type ofcarriers used for transmission between the radio node 101 and thewireless device 120 DL, UL or both, the type of uplink informationtransmitted by the wireless device 120 from: the HARQ-ACK, the SR andthe periodic CSI, and the duplex mode used in each of the carriers usedfor transmission out of: the TDD mode or the FDD mode. This may also beimplemented by means of the selecting module 902.

The radio node 101 may further configured to, e.g., by means of anindicating module 903 configured to, indicate the selected plurality tothe wireless device 120 in the DL scheduling assignment.

The indicating module 903 may be the processor 906 of the radio node101.

In some embodiments, to indicate comprises to send the respectiveindicator to the wireless device 120 for the selected plurality. Theindicator may be comprised in the field of the respective single DLscheduling assignment.

In some embodiments, the field may be one of: a) the TCP field; b) thefield comprising two sections, wherein one section is to indicate a ULcomponent carrier which carries the selected plurality of PUCCH resourceunits, and one section is to indicate the PUCCH resource offset withrespect to a first PUCCH resource unit within the UL component carrier;and c) the DCI field, which indicates the selected plurality of PUCCHresource units together with a serving cell index information.

In some embodiments, the respective single DL scheduling assignment isconfigured to be sent over a PDCCH or a EPDCCH.

The radio node 101 may further configured to, e.g., by means of areceiving module 904 configured to, receive uplink information from thewireless device 120 on the selected plurality of PUCCH resource units.

The receiving module 904 may be the processor 906 of the radio node 101.

The radio node 101 may be configured to perform other actions with othermodules configured 905 to perform these actions within the radio node101. Each of the other modules 905 may be the processor 906 of the radionode 101, or an application running on such processor.

The embodiments herein for configuring the wireless device 120 may beimplemented through one or more processors, such as the processor 906 inthe radio node 101 depicted in FIG. 9, together with computer programcode for performing the functions and actions of the embodiments herein.The program code mentioned above may also be provided as a computerprogram product, for instance in the form of a data carrier carryingcomputer program code for performing the embodiments herein when beingloaded into the in the radio node 101. One such carrier may be in theform of a CD ROM disc. It is however feasible with other data carrierssuch as a memory stick. The computer program code may furthermore beprovided as pure program code on a server and downloaded to the radionode 101. As indicated above, the processor 906 may comprise one or morecircuits, which may also be referred to as one or more modules in someembodiments, each configured to perform the actions carried out by theradio node 101, as described above in reference to FIG. 9, e.g., theconfiguring module 901, the selecting module 902, the indicating module903, and the receiving module 904. Hence, in some embodiments, theconfiguring module 901, the selecting module 902, the indicating module903, the receiving module 904, and the other modules 905 described abovemay be implemented as one or more applications running on one or moreprocessors such as the processor 906. That is, the methods according tothe embodiments described herein for the radio node 101 are respectivelyimplemented by means of a computer program product, comprisinginstructions, i.e., software code portions, which, when executed on atleast one processor, cause the at least one processor to carry out theactions described herein, as performed by the radio node 101. Thecomputer program product may be stored on a computer-readable storagemedium. The computer-readable storage medium, having stored thereon thecomputer program, may comprise instructions which, when executed on atleast one processor, cause the at least one processor to carry out theactions described herein, as performed by the radio node 101. In someembodiments, the computer-readable storage medium may be anon-transitory computer-readable storage medium, such as a CD ROM disc,or a memory stick. In other embodiments, the computer program productmay be stored on a carrier containing the computer program, wherein thecarrier is one of an electronic signal, optical signal, radio signal, orthe computer-readable storage medium, as described above.

The radio node 101 may further comprise a memory 907 comprising one ormore memory units. The memory 907 may be arranged to be used to storeobtained information, such as the information received by the processor906, store data configurations, scheduling, and applications etc. toperform the methods herein when being executed in the radio node 101.Memory 907 may be in communication with the processor 906. Any of theother information processed by the processor 906 may also be stored inthe memory 907.

In some embodiments, information e.g., from the wireless device 120, maybe received through a receiving port 908. The receiving port 908 may bein communication with the processor 906. The receiving port 908 may alsobe configured to receive other information.

The processor 906 may be further configured to send messages, e.g., tothe wireless device 120, through a sending port 909, which may be incommunication with the processor 906, and the memory 907.

Those skilled in the art will also appreciate that the any module withinthe radio node 101, e.g., the configuring module 901, the selectingmodule 902, the indicating module 903, the receiving module 904, and theother modules 905 described above, may refer to a combination of analogand digital circuits, and/or one or more processors configured withsoftware and/or firmware, e.g. stored in the memory, that when executedby the one or more processors such as the processor 906, perform actionsas described above, in relation to FIGS. 4-7. One or more of theseprocessors, as well as the other digital hardware, may be included in asingle application-specific integrated circuitry (ASIC), or severalprocessors and various digital hardware may be distributed among severalseparate components, whether individually packaged or assembled into asystem-on-a-chip (SoC).

To perform the method actions described above in relation to FIG. 8, thewireless device 120 is configured to receive the configuration from theradio node 101. The wireless device 120 comprises the followingarrangement depicted in FIG. 10. As already mentioned, the radio node101 and the wireless device 120 are configured to operate in thewireless communications network 100.

The detailed description of some of the following corresponds to thesame references provided above, in relation to the actions described forthe wireless device 120, and will thus not be repeated here.

The wireless device 120 is further configured to, e.g., by means of areceiving module 1001 configured to, receive the configuration from theradio node 101 with the plurality of PUCCH resource units, wherein theplurality of PUCCH resource units is associated with the number of DLaggregated carriers.

In some embodiments, for at least some of the aggregated carriers in thenumber of downlink aggregated carriers, each aggregated carrier may beconfigured to be allocated a different PUCCH resource unit within theplurality of PUCCH resource units, wherein each PUCCH resource unit maybe identifiable by the respective indicator in the respective single DLscheduling assignment.

In some of these or other embodiments, each aggregated carrier in thenumber of DL aggregated carriers may be configured to be allocated theplurality of PUCCH resource units as a group, wherein the plurality ofPUCCH resource units may be identifiable by a single indicator in therespective single DL scheduling assignment.

In some embodiments, the plurality may be identifiable by the indicatorin the single DL scheduling assignment.

The receiving module 1001 may be a processor 1004 or processing moduleof the wireless device 120.

In some embodiments, the configuration from the radio node 101 comprisesthe set of pluralities of PUCCH resource units, each of the pluralitiesbeing identifiable by the respective indicator in the respective singleDL scheduling assignment. This may also be implemented by means of thereceiving module 1001.

In some embodiments, each of the pluralities of PUCCH resource units isrepresented by the single index, each single index corresponding to therespective indicator.

In some embodiments, each of the pluralities of PUCCH resource units isgrouped.

In some embodiments, at least one of the pluralities of PUCCH resourceunits is associated with the number of DL aggregated carriers.

In some embodiments, at least one of the pluralities of PUCCH resourceunits is mapped to consecutive resource units.

In some embodiments, the PUCCH resource units are of PUCCH format 3.

The wireless device 120 may further configured to, e.g., by means of thereceiving module 1001 configured to, receive the indication from theradio node 101 with the selected plurality out of the configured set ofpluralities of PUCCH resource units for allocation to the wirelessdevice 120, in the DL scheduling assignment.

In some embodiments, to receive comprises to receive the respectiveindicator from the radio node 101 for the selected plurality, theindicator being comprised in the field of the respective single DLscheduling assignment. This may also be implemented by means of thereceiving module 1001.

In some embodiments, the field may be one of: a) the TCP field; b) thefield comprising two sections, wherein one section is to indicate a ULcomponent carrier which carries the selected plurality of PUCCH resourceunits, and one section is to indicate the PUCCH resource offset withrespect to a first PUCCH resource unit within the UL component carrier;and c) the DCI field, which indicates the selected plurality of PUCCHresource units together with the serving cell index information.

In some embodiments, the respective single DL scheduling assignment isconfigured to be received over the PDCCH or the EPDCCH.

In some embodiments, the selected plurality is configured to have beenselected by the radio node 101 based on at least one of: the number ofaggregated carriers used for transmission between the radio node 101 andthe wireless device 120 DL, UL or both, the type of carriers used fortransmission between the radio node 101 and the wireless device 120 DL,UL or both, the type of uplink information transmitted by the wirelessdevice 120 from: the HARQ-ACK, the scheduling request SR and theperiodic CSI, and the duplex mode used in each of the carriers used fortransmission out of: the TDD mode and the FDD mode.

The wireless device 120 may further be configured to, e.g., by means ofa determining module 1003 configured to, determine the one or morecarriers for transmission of the UL information on the selectedplurality of the PUCCH resource units to the radio node 101.

The determining module 1003 may be the processor 1004 of the wirelessdevice 120.

The wireless device 120 may further configured to, e.g., by means of thedetermining module 1003 configured to, determine the selected pluralityof the PUCCH resource units, based on the received indication and thereceived configuration from the radio node 101.

The wireless device 120 may further configured to, e.g., by means of asending module 1002 configured to, send the uplink information to theradio node 101 on the selected plurality of PUCCH resource units.

The sending module 1002 may be the processor 1004 of the wireless device120.

In some embodiments, to send the UL information to the radio node 101comprises to send the UL information on the derived plurality of PUCCHresource units, and using the determined one or more carriers. This mayalso be implemented by means of the sending module 1002.

The wireless device 120 may be configured to perform other actions withother modules 1008 configured to perform these actions within thewireless device 120. Each of the other modules 905 may be the processor1004 of the wireless device 120, or an application running on suchprocessor.

The embodiments herein for receiving the configuration from the radionode 101 may be implemented through one or more processors, such as theprocessor 1004 in the wireless device 120 depicted in FIG. 10, togetherwith computer program code for performing the functions and actions ofthe embodiments herein. The program code mentioned above may also beprovided as a computer program product, for instance in the form of adata carrier carrying computer program code for performing theembodiments herein when being loaded into the in the wireless device120. One such carrier may be in the form of a CD ROM disc. It is howeverfeasible with other data carriers such as a memory stick. The computerprogram code may furthermore be provided as pure program code on aserver and downloaded to the wireless device 120. As indicated above,the processor 1004 may comprise one or more circuits, which may also bereferred to as one or more modules in some embodiments, each configuredto perform the actions carried out by the wireless device 120, asdescribed above in reference to FIG. 10, e.g., the receiving module1001, the sending module 1002, and the determining module 1003. Hence,in some embodiments, the receiving module 1001, the sending module 1002,the determining module 1003, and the other modules 1008 described abovemay be implemented as one or more applications running on one or moreprocessors such as the processor 1004. That is, the methods according tothe embodiments described herein for the wireless device 120 arerespectively implemented by means of a computer program product,comprising instructions, i.e., software code portions, which, whenexecuted on at least one processor, cause the at least one processor tocarry out the actions described herein, as performed by the wirelessdevice 120. The computer program product may be stored on acomputer-readable storage medium. The computer-readable storage medium,having stored thereon the computer program, may comprise instructionswhich, when executed on at least one processor, cause the at least oneprocessor to carry out the actions described herein, as performed by thewireless device 120. In some embodiments, the computer-readable storagemedium may be a non-transitory computer-readable storage medium, such asa CD ROM disc, or a memory stick. In other embodiments, the computerprogram product may be stored on a carrier containing the computerprogram, wherein the carrier is one of an electronic signal, opticalsignal, radio signal, or the computer-readable storage medium, asdescribed above.

The wireless device 120 may further comprise a memory 1005 comprisingone or more memory units. The memory 1005 may be arranged to be used tostore obtained information, such as the information received by theprocessor 1004, store data configurations, scheduling, and applicationsetc. to perform the methods herein when being executed in the wirelessdevice 120. Memory 1005 may be in communication with the processor 1004.Any of the other information processed by the processor 1004 may also bestored in the memory 1005.

In some embodiments, information e.g., from the radio node 101, may bereceived through a receiving port 1006. The receiving port 1006 may bein communication with the processor 1004. The receiving port 1006 mayalso be configured to receive other information.

The processor 1004 may be further configured to send messages, e.g., tothe radio node 101, through a sending port 1007, which may be incommunication with the processor 1004, and the memory 1005.

Those skilled in the art will also appreciate that the any module withinthe wireless device 120, e.g., the receiving module 1001, the sendingmodule 1002, the determining module 1003, and the other modules 1008described above, may refer to a combination of analog and digitalcircuits, and/or one or more processors configured with software and/orfirmware, e.g. stored in the memory, that when executed by the one ormore processors such as the processor 1004, perform actions as describedabove, in relation to FIG. 8. One or more of these processors, as wellas the other digital hardware, may be included in a singleapplication-specific integrated circuitry (ASIC), or several processorsand various digital hardware may be distributed among several separatecomponents, whether individually packaged or assembled into asystem-on-a-chip (SoC).

When using the word “comprise” or “comprising” it shall be interpretedas non-limiting, i.e. meaning “consist at least of”.

The embodiments herein are not limited to the above described preferredembodiments. Various alternatives, modifications and equivalents may beused. Therefore, the above embodiments should not be taken as limitingthe scope of the invention. It is to be understood that the embodimentsare not to be limited to the specific examples disclosed, and thatmodifications and other variants are intended to be included within thescope of this disclosure. Although specific terms may be employedherein, they are used in a generic and descriptive sense only and notfor purposes of limitation.

Selected examples related to embodiments herein:

Example 1 is related to a method performed by a radio node (101) forconfiguring a wireless device (120), the radio node (101) and thewireless device (120) operating in a wireless communications network(100), the method comprising: configuring (401) the wireless device(120) with a plurality of Physical Uplink Control Channel, PUCCH,resource units, the plurality of PUCCH resource units being identifiableby an indicator in a single Downlink, DL, scheduling assignment.

Example 2 is related to the method of example 1, wherein the configuring(401) comprises configuring (401) the wireless device (120) with a setof pluralities of PUCCH resource units, each of the pluralities of PUCCHresource units being identifiable by a respective indicator in arespective single DL scheduling assignment, the method furthercomprising: a) selecting (402) a plurality of PUCCH resource units outof the configured set of pluralities of PUCCH resource units forallocation to the wireless device (120), and b) indicating (403) theselected plurality of PUCCH resource units to the wireless device (120)in a DL scheduling assignment.

Example 3 is related to the method of example 2, wherein the indicating(403) comprises sending the respective indicator to the wireless device(120) for the selected plurality of PUCCH resource units, the indicatorbeing comprised in a field of the respective single DL schedulingassignment.

Example 4 is related to the method of any of examples 2-3, wherein theselecting (402) is based on at least one of: a number of aggregatedcarriers used for transmission between the radio node (101) and thewireless device (120), a type of carriers used for transmission betweenthe radio node (101) and the wireless device (120), a type of uplinkinformation transmitted by the wireless device (120) from: a HybridAutomatic Repeat reQuest-ACKnowledgement (HARQ-ACK), a schedulingrequest (SR) and a periodic Channel State Information (CSI), and aduplex mode used in each of the carriers used for transmission out of:Time Division Duplex and Frequency Division Duplex.

Example 5 is related to the method of any of examples 3-4, wherein eachof the pluralities of PUCCH resource units is represented by a singleindex, each single index corresponding to the respective indicator.

Example 6 is related to the method of any of examples 3-5, wherein therespective single DL scheduling assignment is sent over a PhysicalDownlink Control Channel (PDCCH) or an Enhanced Physical DownlinkControl Channel (EPDCCH).

Example 7 is related to the method of any of examples 2-6, wherein eachof the pluralities of PUCCH resource units is grouped.

Example 8 is related to the method of any of examples 2-7, wherein (atleast one) each of the pluralities of PUCCH resource units is associatedwith a number of aggregated carriers.

Example 9 is related to the method of any of examples 2-8, wherein atleast one of the pluralities of PUCCH resource units is comprised ofconsecutive resource units.

Example 1 is related to the method of any of examples 1-9, wherein thePUCCH resource units are of PUCCH format 3.

Example 11 is related to the method of any of examples 2-9, furthercomprising: receiving (404) uplink information from the wireless device(120) on the selected plurality of PUCCH resource units.

Example 12 is related to a computer program, comprising instructionswhich, when executed on at least one processor, cause the at least oneprocessor to carry out the method according to any one of examples 1 to11.

Example 13 is related to a computer-readable storage medium, havingstored thereon a computer program, comprising instructions which, whenexecuted on at least one processor, cause the at least one processor tocarry out the method according to any one of examples 1 to 11.

Example 14 is related to a method performed by a wireless device (120)for receiving a configuration from a radio node (101), the radio node(101) and the wireless device (120) operating in a wirelesscommunications network (100), the method comprising: receiving (801) aconfiguration from the radio node (101) with a plurality of PhysicalUplink Control Channel, PUCCH, resource units, the plurality of PUCCHresource units being identifiable by an indicator in a single Downlink,DL, scheduling assignment.

Example 15 is related to the method of example 14, wherein theconfiguration from the radio node (101) comprises a set of pluralitiesof PUCCH resource units, each of the pluralities of PUCCH resource unitsbeing identifiable by a respective indicator in a respective single DLscheduling assignment, the method further comprising: receiving (802) anindication from the radio node (101) with a selected plurality out ofthe configured set of pluralities of PUCCH resource units for allocationto the wireless device (120), in a DL scheduling assignment.

Example 16 is related to the method of example 15, wherein the receiving(802) comprises receiving the respective indicator from the radio node(101) for the selected plurality, the indicator being comprised inafield of the respective single DL scheduling assignment.

Example 17 is related to the method of any of examples 15-16, whereinthe selected plurality has been selected by the radio node (101) basedon at least one of: a number of aggregated carriers used fortransmission between the radio node (101) and the wireless device (120),a type of carriers used for transmission between the radio node (101)and the wireless device (120), a type of uplink information transmittedby the wireless device (120) from: a Hybrid Automatic RepeatreQuest-ACKnowledgement (HARQ-ACK), a scheduling request (SR) and aperiodic Channel State Information (CSI), and a duplex mode used in eachof the carriers used for transmission out of: Time Division Duplex andFrequency Division Duplex.

Example 18 is related to the method of any of examples 16-17, whereineach of the pluralities of PUCCH resource units is represented by asingle index, each single index corresponding to the respectiveindicator.

Example 19 is related to the method of any of examples 16-18, whereinthe respective single DL scheduling assignment is received over aPhysical Downlink Control Channel (PDCCH) or an Enhanced PhysicalDownlink Control Channel (EPDCCH)

Example 20 is related to the method of any of examples 15-19, whereineach of the pluralities of PUCCH resource units is grouped.

Example 21 is related to the method of any of examples 15-20, wherein atleast one of the pluralities of PUCCH resource units is associated witha number of aggregated carriers.

Example 22 is related to the method of any of examples 15-21, wherein atleast one of the pluralities of PUCCH resource units is comprised ofconsecutive resource units.

Example 23 is related to the method of any of examples 14-22, whereinthe PUCCH resource units are of PUCCH format 3.

Example 24 is related to the method of any of examples 15-23, furthercomprising: determining (803) one or more carriers for transmission ofUL information on the selected plurality of the PUCCH resource units tothe radio node 101.

Example 25 is related to the method of any of examples 15-24, furthercomprising: determining (804) the selected plurality of the PUCCHresource units, based on the received indication and the receivedconfiguration from the radio node 101.

Example 26 is related to the method of any of examples 15-25, furthercomprising: sending (805) uplink information to the radio node (101) onthe selected plurality of PUCCH resource units.

Example 27 is related to the method of any of examples 24, 25 and 26,wherein the sending (805) the UL information to the radio node (101)comprises sending the UL information on the derived plurality of PUCCHresource units, and using the determined one or more carriers.

Example 28 is related to a computer program, comprising instructionswhich, when executed on at least one processor, cause the at least oneprocessor to carry out the method according to any one of examples 14 to27.

Example 29 is related to a computer-readable storage medium, havingstored thereon a computer program, comprising instructions which, whenexecuted on at least one processor, cause the at least one processor tocarry out the method according to any one of examples 14 to 27.

Example 30 is related to a radio node (101) configured to configure awireless device (120), the radio node (101) and the wireless device(120) being configured to operate in a wireless communications network(100), the radio node (101) being further configured to: configure thewireless device (120) with a plurality of Physical Uplink ControlChannel, PUCCH, resource units, the plurality of PUCCH resource unitsbeing identifiable by an indicator in a single Downlink, DL, schedulingassignment.

Example 31 is related to the radio node (101) of example 30, wherein toconfigure comprises to configure the wireless device (120) with a set ofpluralities of PUCCH resource units, each of the pluralities of PUCCHresource units being identifiable by a respective indicator in arespective single DL scheduling assignment, the radio node (101) beingfurther configured to: a) select a plurality out of the configured setof pluralities of PUCCH resource units for allocation to the wirelessdevice (120), and b) indicate the selected plurality of PUCCH resourceunits to the wireless device (120) in a DL scheduling assignment.

Example 32 is related to the radio node (101) of example 31, wherein toindicate comprises to send the respective indicator to the wirelessdevice (120) for the selected plurality of PUCCH resource units, theindicator being comprised in a field of the respective single DLscheduling assignment.

Example 33 is related to the radio node (101) of any of examples 31-32,wherein to select is configured to be based on at least one of: a numberof aggregated carriers used for transmission between the radio node(101) and the wireless device (120), a type of carriers used fortransmission between the radio node (101) and the wireless device (120),a type of uplink information transmitted by the wireless device (120)from: a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK), ascheduling request (SR) and a periodic Channel State Information (CSI),and a duplex mode used in each of the carriers used for transmission outof: Time Division Duplex and Frequency Division Duplex.

Example 34 is related to the radio node (101) of any of examples 32-33,wherein each of the pluralities of PUCCH resource units is representedby a single index, each single index corresponding to the respectiveindicator.

Example 35 is related to the radio node (101) of any of examples 32-34,wherein the respective single DL scheduling assignment is configured tobe sent over a Physical Downlink Control Channel (PDCCH) or an EnhancedPhysical Downlink Control Channel (EPDCCH).

Example 36 is related to the radio node (101) of any of examples 31-35,wherein each of the pluralities of PUCCH resource units is grouped.

Example 37 is related to the radio node (101) of any of examples 31-36,wherein at least one of the pluralities of PUCCH resource units isassociated with a number of aggregated carriers.

Example 38 is related to the radio node (101) of any of examples 31-37,wherein at least one of the pluralities of PUCCH resource units iscomprised of consecutive resource units.

Example 39 is related to the radio node (101) of any of examples 30-38,wherein the PUCCH resource units are of PUCCH format 3.

Example 40 is related to the radio node (101) of any of examples 31-39,being further configured to: receive uplink information from thewireless device (120) on the selected plurality of PUCCH resource units.

Example 41 is related to a wireless device (120) configured to receive aconfiguration from a radio node (101), the radio node (101) and thewireless device (120) being configured to operate in a wirelesscommunications network (100), the wireless device (120) being furtherconfigured to: receive a configuration from the radio node (101) with aplurality of Physical Uplink Control Channel, PUCCH, resource units, theplurality of PUCCH resource units being identifiable by an indicator ina single Downlink, DL, scheduling assignment.

Example 42 is related to the wireless device (120) of example 41,wherein the configuration from the radio node (101) comprises a set ofpluralities of PUCCH resource units, each of the pluralities of PUCCHresource units being identifiable by a respective indicator in arespective single DL scheduling assignment, the wireless device (120)being further configured to: receive an indication from the radio node(101) with a selected plurality out of the configured set of pluralitiesof PUCCH resource units for allocation to the wireless device (120), ina DL scheduling assignment.

Example 43 is related to the wireless device (120) of example 42,wherein to receive comprises to receive the respective indicator fromthe radio node (101) for the selected plurality of PUCCH resource units,the indicator being comprised in a field of the respective single DLscheduling assignment.

Example 44 is related to the wireless device (120) of any of examples42-43, wherein the selected plurality of PUCCH resource units isconfigured to have been selected by the radio node (101) based on atleast one of: a number of aggregated carriers used for transmissionbetween the radio node (101) and the wireless device (120), a type ofcarriers used for transmission between the radio node (101) and thewireless device (120), a type of uplink information transmitted by thewireless device (120) from: a Hybrid Automatic RepeatreQuest-ACKnowledgement (HARQ-ACK), a scheduling request (SR) and aperiodic Channel State Information (CSI), and a duplex mode used in eachof the carriers used for transmission out of: Time Division Duplex andFrequency Division Duplex.

Example 45 is related to the wireless device (120) of any of examples42-44, wherein each of the pluralities of PUCCH resource units isrepresented by a single index, each single index corresponding to therespective indicator.

Example 46 is related to the wireless device (120) of any of examples43-45, wherein the respective single DL scheduling assignment isconfigured to be received over a Physical Downlink Control Channel(PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH).

Example 47 is related to the wireless device (120) of any of examples42-46, wherein each of the pluralities of PUCCH resource units isgrouped.

Example 48 is related to the wireless device (120) of any of examples42-47, wherein at least one of the pluralities of PUCCH resource unitsis associated with a number of aggregated carriers.

Example 49 is related to the wireless device (120) of any of examples42-48, wherein at least one of the pluralities of PUCCH resource unitsis comprised of consecutive resource units.

Example 50 is related to the wireless device (120) of any of examples41-49, wherein the PUCCH resource units are of PUCCH format 3.

Example 51 is related to the wireless device (120) of any of examples42-50, being further configured to: determine one or more carriers fortransmission of UL information on the selected plurality of the PUCCHresource units to the radio node 101.

Example 52 is related to the wireless device (120) of any of examples42-51, being further configured to: determine the selected plurality ofthe PUCCH resource units, based on the received indication and thereceived configuration from the radio node 101.

Example 53 is related to the wireless device (120) of any of examples42-52, being further configured to: send uplink information to the radionode (101) on the selected plurality of PUCCH resource units.

Example 54 is related to the wireless device (120) of any of examples51, 52 and 53, wherein to send the UL information to the radio node(101) comprises to send the UL information on the derived plurality ofPUCCH resource units, and using the determined one or more carriers.

The invention claimed is:
 1. A method, performed by a radio node, forconfiguring a wireless device, the radio node and the wireless deviceoperating in a wireless communications network, the method comprising:configuring the wireless device with a plurality of Physical UplinkControl Channel (PUCCH) resource units, wherein the plurality of PUCCHresource units is associated with a number of downlink (DL) aggregatedcarriers; wherein the configuring of the wireless device comprisesconfiguring the wireless device with a set of pluralities of PUCCHresource units, each of the pluralities of PUCCH resource units in theset being identifiable by a respective indicator in a respective singleDL scheduling assignment; selecting a plurality of PUCCH resource unitsout of the configured set of pluralities of PUCCH resource units forallocation to the wireless device; and indicating the selected pluralityof PUCCH resource units to the wireless device in a DL schedulingassignment.
 2. The method of claim 1, wherein at least one of: for atleast some of the aggregated carriers in the number of downlinkaggregated carriers, each aggregated carrier is allocated a differentPUCCH resource unit within the plurality of PUCCH resource units,wherein each PUCCH resource unit is identifiable by a respectiveindicator in a respective single DL scheduling assignment; and eachaggregated carrier in the number of downlink aggregated carriers isallocated the plurality of PUCCH resource units as a group, wherein theplurality of PUCCH resource units is identifiable by a single indicatorin a respective single DL scheduling assignment.
 3. The method of claim1, wherein the indicating comprises sending the respective indicator tothe wireless device for the selected plurality of PUCCH resource units,the indicator being comprised in a field of the respective single DLscheduling assignment.
 4. The method of claim 3, wherein the field isone of: a Transmission Control Protocol (TCP) field; a field comprisingfirst and second sections, wherein the first section indicates an Uplink(UL) component carrier which carries the selected plurality of PUCCHresource units, and the second section indicates the PUCCH resourceoffset with respect to a first PUCCH resource unit within the ULcomponent carrier; a Downlink Control Information (DCI) field whichindicates the selected plurality of PUCCH resource units together with aserving cell index information.
 5. The method of claim 1, wherein theselecting is based on at least one of: a number of aggregated carriersused for transmission between the radio node and the wireless device DL,Uplink (UL), or both; a type of carriers used for transmission betweenthe radio node and the wireless device DL, UL, or both; a type of uplinkinformation transmitted by the wireless device from: a Hybrid AutomaticRepeat reQuest-ACKnowledgement (HARQ-ACK); a scheduling request (SR);and a periodic Channel State Information (CSI); and a duplex mode usedin each of the carriers used for transmission out of: a Time DivisionDuplex mode and a Frequency Division Duplex mode.
 6. The method of claim1, wherein each of the pluralities of PUCCH resource units isrepresented by a single index, each single index corresponding to therespective indicator.
 7. The method of claim 1, wherein the respectivesingle DL scheduling assignment is sent over a Physical Downlink ControlChannel (PDCCH) or an Enhanced Physical Downlink Control Channel(EPDCCH).
 8. The method of claim 1, wherein each of the pluralities ofPUCCH resource units is grouped.
 9. The method of claim 1, wherein atleast one of the pluralities of PUCCH resource units is associated withthe number of DL aggregated carriers.
 10. The method of claim 1, whereinat least one of the pluralities of PUCCH resource units is mapped toconsecutive resource units.
 11. The method of claim 1, furthercomprising receiving uplink information from the wireless device on theselected plurality of PUCCH resource units.
 12. The method of claim 1,wherein the PUCCH resource units are of PUCCH format
 3. 13. A computerprogram product stored in a non-transitory computer readable medium forcontrolling a radio node in configuring a wireless device, the radionode and the wireless device operating in a wireless communicationsnetwork, the computer program product comprising software instructionswhich, when run on one or more processors of the radio node, causes theradio node to: configure the wireless device with a plurality ofPhysical Uplink Control Channel (PUCCH) resource units, wherein theplurality of PUCCH resource units is associated with a number ofdownlink (DL) aggregated carriers; wherein to configure the wirelessdevice comprises to configure the wireless device with a set ofpluralities of PUCCH resource units, each of the pluralities of PUCCHresource units in the set being identifiable by a respective indicatorin a respective single DL scheduling assignment; select a plurality ofPUCCH resource units out of the configured set of pluralities of PUCCHresource units for allocation to the wireless device; and indicate theselected plurality of PUCCH resource units to the wireless device in aDL scheduling assignment.
 14. A method, performed by a wireless device,for receiving a configuration from a radio node, the radio node and thewireless device operating in a wireless communications network, themethod comprising: receiving a configuration from the radio node with aplurality of Physical Uplink Control Channel (PUCCH) resource units,wherein the plurality of PUCCH resource units are associated with anumber of downlink aggregated carriers; wherein the receivedconfiguration from the radio node comprises a set of pluralities ofPUCCH resource units, each of the pluralities of PUCCH resource unitsbeing identifiable by a respective indicator in a respective single DLscheduling assignment; receiving an indication from the radio node witha selected plurality out of the configured set of pluralities of PUCCHresource units for allocation to the wireless device, in a DL schedulingassignment; and configuring uplink communications for the wirelessdevice according to the received indication.
 15. The method of claim 14,wherein at least one of: for at least some of the aggregated carriers inthe number of downlink aggregated carriers, each aggregated carrier isallocated a different PUCCH resource unit within the plurality of PUCCHresource units, wherein each PUCCH resource unit is identifiable by arespective indicator in a respective single Downlink (DL) schedulingassignment, and each aggregated carrier in the number of downlinkaggregated carriers is allocated the plurality of PUCCH resource unitsas a group, wherein the plurality of PUCCH resource units isidentifiable by a single indicator in a respective single DL schedulingassignment.
 16. The method of claim 14, wherein the receiving theindication comprises receiving the respective indicator from the radionode for the selected plurality, the indicator being comprised in afield of the respective single DL scheduling assignment.
 17. The methodof claim 16, wherein the field is one of: a Transmission ControlProtocol (TCP) field; a field comprising first and second sections,wherein the first section indicates an Uplink (UL) component carrierwhich carries the selected plurality of PUCCH resource units, and thesecond section indicates the PUCCH resource offset with respect to thefirst PUCCH resource unit within the UL component carrier; a DownlinkControl Information (DCI) field which indicates the selected pluralityof PUCCH resource units together with the serving cell indexinformation.
 18. The method of claim 14, wherein the selected pluralityhas been selected by the radio node based on at least one of: a numberof aggregated carriers used for transmission between the radio node andthe wireless device DL, uplink (UL), or both; a type of carriers usedfor transmission between the radio node and the wireless device DL, UL,or both; a type of uplink information transmitted by the wireless devicefrom: a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK); ascheduling request (SR); and a periodic Channel State Information (CSI);and a duplex mode used in each of the carriers used for transmission outof: a Time Division Duplex mode and a Frequency Division Duplex mode.19. The method of claim 14, wherein each of the pluralities of PUCCHresource units is represented by a single index, each single indexcorresponding to the respective indicator.
 20. The method of claim 14,wherein the respective single DL scheduling assignment is received overa Physical Downlink Control Channel (PDCCH) or an Enhanced PhysicalDownlink Control Channel (EPDCCH).
 21. The method of claim 14, whereineach of the pluralities of PUCCH resource units is grouped.
 22. Themethod of claim 14, wherein at least one of the pluralities of PUCCHresource units is associated with the number of DL aggregated carriers.23. The method of claim 14, wherein at least one of the pluralities ofPUCCH resource units is mapped to consecutive resource units.
 24. Themethod of claim 14, further comprising determining one or more carriersfor transmission of uplink (UL) information on the selected plurality ofthe PUCCH resource units to the radio node.
 25. The method of claim 14,further comprising determining the selected plurality of the PUCCHresource units based on the received indication and the receivedconfiguration from the radio node.
 26. The method of claim 14, furthercomprising sending uplink (UL) information to the radio node on theselected plurality of PUCCH resource units.
 27. The method of claim 26,wherein the sending the UL information to the radio node comprisessending the UL information on the derived plurality of PUCCH resourceunits, and using the determined one or more carriers.
 28. The method ofclaim 14, wherein the PUCCH resource units are of PUCCH format
 3. 29. Acomputer program product stored in a non-transitory computer readablemedium for controlling a wireless device for receiving a configurationfrom a radio node, the radio node and the wireless device operating in awireless communications network, the computer program product comprisingsoftware instructions which, when run on one or more processors of thewireless device, causes the wireless device to: receive a configurationfrom the radio node with a plurality of Physical Uplink Control Channel(PUCCH) resource units, wherein the plurality of PUCCH resource unitsare associated with a number of downlink aggregated carriers; whereinthe received configuration from the radio node comprises a set ofpluralities of PUCCH resource units, each of the pluralities of PUCCHresource units being identifiable by a respective indicator in arespective single DL scheduling assignment; receive an indication fromthe radio node with a selected plurality out of the configured set ofpluralities of PUCCH resource units for allocation to the wirelessdevice, in a DL scheduling assignment; and configure uplinkcommunications for the wireless device according to the receivedindication.
 30. A radio node configured to configure a wireless device,the radio node and the wireless device being configured to operate in awireless communications network, the radio node comprising: a processingcircuit; memory containing instructions executable by the processingcircuit whereby the radio node is operative to: configure the wirelessdevice with a plurality of Physical Uplink Control Channel (PUCCH)resource units, wherein the plurality of PUCCH resource units isassociated with a number of downlink aggregated carriers; wherein toconfigure the wireless device comprises to configure the wireless devicewith a set of pluralities of PUCCH resource units, each of thepluralities of PUCCH resource units being identifiable by a respectiveindicator in a respective single DL scheduling assignment; select aplurality out of the configured set of pluralities of PUCCH resourceunits for allocation to the wireless device; and indicate the selectedplurality of PUCCH resource units to the wireless device in a DLscheduling assignment.
 31. The method of claim 30, wherein at least oneof: for at least some of the aggregated carriers in the number ofdownlink aggregated carriers, each aggregated carrier is configured tobe allocated a different PUCCH resource unit within the plurality ofPUCCH resource units, wherein each PUCCH resource unit is identifiableby a respective indicator in a respective single Downlink (DL)scheduling assignment; and each aggregated carrier in the number ofdownlink aggregated carriers is configured to be allocated the pluralityof PUCCH resource units as a group, wherein the plurality of PUCCHresource units is identifiable by a single indicator in a respectivesingle DL scheduling assignment.
 32. The radio node of claim 30, whereinthe radio node is configured to indicate the selected plurality of PUCCHresource units to the wireless device in a DL scheduling assignment bysending the respective indicator to the wireless device for the selectedplurality of PUCCH resource units, the indicator being comprised in afield of the respective single DL scheduling assignment.
 33. The radionode of claim 32, wherein the field is one of: a Transmission ControlProtocol (TCP) field; a field comprising first and second sections,wherein the first section indicates an Uplink (UL) component carrierwhich carries the selected plurality of PUCCH resource units, and thesecond section indicates the PUCCH resource offset with respect to thefirst PUCCH resource unit within the UL component carrier; a DownlinkControl Information (DCI) field which indicates the selected pluralityof PUCCH resource units together with the serving cell indexinformation.
 34. The radio node of claim 30, wherein the radio node isconfigured to select the plurality out of the configured set ofpluralities of PUCCH resource units for allocation to the wirelessdevice based on at least one of: a number of aggregated carriers usedfor transmission between the radio node and the wireless device DL,Uplink (UL), or both; a type of carriers used for transmission betweenthe radio node and the wireless device DL, UL, or both; a type of uplinkinformation transmitted by the wireless device from: a Hybrid AutomaticRepeat reQuest-ACKnowledgement (HARQ-ACK); a scheduling request (SR);and a periodic Channel State Information (CSI); and a duplex mode usedin each of the carriers used for transmission out of: a Time DivisionDuplex mode and a Frequency Division Duplex mode.
 35. The radio node ofclaim 30, wherein each of the pluralities of PUCCH resource units isrepresented by a single index, each single index corresponding to therespective indicator.
 36. The radio node of claim 30, wherein therespective single DL scheduling assignment is configured to be sent overa Physical Downlink Control Channel (PDCCH) or an Enhanced PhysicalDownlink Control Channel (EPDCCH).
 37. The radio node of claim 30,wherein each of the pluralities of PUCCH resource units is grouped. 38.The radio node of claim 30, wherein at least one of the pluralities ofPUCCH resource units is associated with the number of DL aggregatedcarriers.
 39. The radio node of claim 30, wherein at least one of thepluralities of PUCCH resource units is mapped to consecutive resourceunits.
 40. The radio node of claim 30, wherein the radio node is furtherconfigured to receive uplink information from the wireless device on theselected plurality of PUCCH resource units.
 41. The radio node of claim30, wherein the PUCCH resource units are of PUCCH format
 3. 42. Awireless device configured to receive a configuration from a radio node,the radio node and the wireless device being configured to operate in awireless communications network, the wireless device comprising aprocessing circuit; memory containing instructions executable by theprocessing circuit whereby the wireless device is operative to: receivea configuration from the radio node with a plurality of Physical UplinkControl Channel (PUCCH) resource units, wherein the plurality of PUCCHresource units is associated with a number of downlink aggregatedcarriers; wherein the configuration from the radio node comprises a setof pluralities of PUCCH resource units, each of the pluralities of PUCCHresource units being identifiable by a respective indicator in arespective single DL scheduling assignment; receive an indication fromthe radio node with a selected plurality out of the configured set ofpluralities of PUCCH resource units for allocation to the wirelessdevice, in a DL scheduling assignment; and configure uplinkcommunications for the wireless device according to the receivedindication.
 43. The wireless device of claim 42, wherein at least oneof: for at least some of the aggregated carriers in the number ofdownlink aggregated carriers, each aggregated carrier is configured tobe allocated a different PUCCH resource unit within the plurality ofPUCCH resource units, wherein each PUCCH resource unit is identifiableby a respective indicator in a respective single Downlink (DL)scheduling assignment; and each aggregated carrier in the number ofdownlink aggregated carriers is configured to be allocated the pluralityof PUCCH resource units as a group, wherein the plurality of PUCCHresource units is identifiable by a single indicator in a respectivesingle DL scheduling assignment.
 44. The wireless device of claim 42,wherein the wireless device is configured to receive the respectiveindicator from the radio node for the selected plurality of PUCCHresource units, the indicator being comprised in a field of therespective single DL scheduling assignment.
 45. The method of claim 44,wherein the field is one of: a Transmission Control Protocol (TCP)field; a field comprising first and second sections, wherein the firstsection indicates an Uplink (UL) component carrier which carries theselected plurality of PUCCH resource units, and the second sectionindicates the PUCCH resource offset with respect to the first PUCCHresource unit within the UL component carrier; a Downlink ControlInformation (DCI) field which indicates the selected plurality of PUCCHresource units together with the serving cell index information.
 46. Thewireless device of claim 42, wherein the selected plurality of PUCCHresource units is configured to have been selected by the radio nodebased on at least one of: a number of aggregated carriers used fortransmission between the radio node and the wireless device DL, uplink(UL), or both; a type of carriers used for transmission between theradio node and the wireless device DL, UL, or both, a type of uplinkinformation transmitted by the wireless device from: a Hybrid AutomaticRepeat reQuest-ACKnowledgement (HARQ-ACK); a scheduling request (SR);and a periodic Channel State Information (CSI); and a duplex mode usedin each of the carriers used for transmission out of: a Time DivisionDuplex mode and a Frequency Division Duplex mode.
 47. The wirelessdevice of claim 42, wherein each of the pluralities of PUCCH resourceunits is represented by a single index, each single index correspondingto the respective indicator.
 48. The wireless device of claim 42,wherein the wireless device is configured to receive the respectivesingle DL scheduling assignment over a Physical Downlink Control Channel(PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH). 49.The wireless device of claim 42, wherein each of the pluralities ofPUCCH resource units is grouped.
 50. The wireless device of claim 42,wherein at least one of the pluralities of PUCCH resource units isassociated with the number of DL aggregated carriers.
 51. The wirelessdevice of claim 42, wherein at least one of the pluralities of PUCCHresource units is mapped to consecutive resource units.
 52. The wirelessdevice of claim 42, wherein the wireless device is further configured todetermine one or more carriers for transmission of uplink (UL)information on the selected plurality of the PUCCH resource units to theradio node.
 53. The wireless device of claim 42, wherein the wirelessdevice is further configured to determine the selected plurality of thePUCCH resource units based on the received indication and the receivedconfiguration from the radio node.
 54. The wireless device of claim 42,wherein the wireless device is further configured to send uplink (UL)information to the radio node on the selected plurality of PUCCHresource units.
 55. The wireless device of claim 54, wherein thewireless device is configured to send the UL information to the radionode on the derived plurality of PUCCH resource units, and using thedetermined one or more carriers.
 56. The wireless device of claim 42,wherein the PUCCH resource units are of PUCCH format 3.